R
-- 2150-TVD-
ManualService
TVD-2150
SERVICE MANUAL
14" TV+DVD
SOLID STATE
Color Television
Receiver (TV SECTION)
PAL SECAM VERSION
TOSHIBA I2C IC
GREAT WALL DIGITAL TV RESEARCH INSTITUTE
This manual is the latest at the time of printing, and does not include the modification which may be made after the printing, by the constant improvment of product.
Document : SM - 49PM |
Date : 20-12-2001 |
Approved by : ___________ |
Checked by : ________________________________________________________
( WANG JUN WEI )
CONTENTS ( TV SECTION )
1.SPECIFICATION.....................................
2.BLOCK DIAGRAM..................................
3.ALIGMENT INSTRUCTION.......................
4.VOLTAGE TABLE...................................
5.IC601 DATA...........................................
6.BLOCK DIAGRAM..................................
7.WIRING DIAGRAM.................................
This manual is the latest at the time of Printing , and does not include the modification
Which may be made ofter the Printing, by the Constant improvement of Product.
SM-49PM P.1
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MODEL : 14" |
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ITEMS OF MEASUREMENT |
STANDARD |
UNIT |
VIDEO SENS. AT S/N 30db L - VHF |
< 57 |
dbuv |
H - VHF |
< 57 |
dbuv |
UHF |
< 60 |
dbuv |
SOUND SENS. AT S/N 30db L - VHF |
< 42 |
dbuv |
H - VHF |
< 42 |
dbuv |
UHF |
< 48 |
dbuv |
AGC CHARACTER |
> 60 |
db |
SELECTIVITY -1.5 MHz |
> 35 |
db |
+ 8 MHz |
> 40 |
db |
COLOR SENS. |
< 45 |
dbuv |
COLOR LOCK - IN RANGE |
> +300 |
Hz |
VERTICAL LOCK - IN RANGE |
> 6 |
Hz |
HORIZONTAL LOCK - IN RANGE |
> 400 |
Hz |
MAX BRIGHTNESS |
> 140 |
cd / m2 |
MAX OUTPUT POWER |
> 1 |
W |
OUTPUT POWER AT 10% THD |
> 0.7 |
W |
BUZZ |
< -40 |
db |
AFC RANGE |
> +1 |
MHz |
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> -0.5 |
MHz |
MIN. VOL HUM |
< 20 |
mV |
RESOLUTION HORIZONTAL |
> 300 |
LINES |
VERTICAL |
> 400 |
LINES |
LINEARITY DISTORTION VERTICAL |
< 10 |
% |
HORIZONTAL |
< 10 |
% |
RASTER DISTORTION |
< 5 |
% |
REMOTE CONTROL DISTANCE |
> 5 |
METER |
ANGLE |
> +15 |
DEGREE |
POWER CONSUMPTION ( AT NORMAL CONDITION ) |
< 60 |
WATTS |
POWER CONSUMPTION ( AT MAX. CONDITION ) |
< 70 |
WATTS |
CONVERGENCE DISLOCATION AT AREA "A" |
< 0.4 |
% |
AREA "B" |
< 0.8 |
% |
( see fig.1 ) |
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H
A B
VIDEO INPUT LEVEL : 1.0V P-P + 3dB |
Fig.1 |
AUDIO INPUT LEVEL : 0.5V RMS + 3dB |
SM - 49PM P.2
SPECIFICATION
SUPPLY VOLTAGE : AC220V 50Hz > + 10% / -20%
MODEL : 14"
SYSTEM : |
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PAL - BG PAL - I |
PAL - SECAM - PAL - SECAM - |
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PAL - I / I |
BG / DK |
BG / DK |
PAL - BG |
PAL - BG |
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(UK) |
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( HYPER ) |
( HYPER ) ( CATV ) |
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CHANNEL L - VHF : |
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2 - 4 |
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1 - 5 |
1 - 5 |
E2 - S10 |
E2 - S2 |
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H - VHF : |
4 - 13 |
5 -12 |
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6 - 12 |
6 - 12 |
E5 - S41 E5 - S20 |
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UHF : |
21 - 69 |
21 - 69 21 -69 |
21 - 69 |
21 - 69 |
E21 - E69 E21 - E69 |
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VIF FREQUENCY : |
38.9 |
38.9 |
39.5 |
38.0 |
38.9 |
38.9 |
38.9 |
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SIF FREQUENCY : |
32.9 |
33.4 |
33.5 |
31.5 |
32.5 |
32.4 |
33.4 |
33.4 |
33.4 |
CHROMA IF FREQUENCY : |
34.47 |
34.47 |
35.07 |
33.57 |
33.57 |
34.47 |
34.47 |
34.47 |
34.47 |
INTER-CARRIER FREQUENCY : |
6.0 |
5.5 |
6 |
6.5 |
5.5 |
6.5 |
5.5 |
5.5 |
5.5 |
SCANNING HORIZONTAL : |
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15625 LINE |
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VERTICAL : |
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50 Hz |
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ANTENNA INPUT IMPEDANCE : |
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75 OHM |
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CRT : |
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14" |
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3.P 49PMSM
CH
CH
CH
MHz
MHz
MHz
MHz
ALIGNMENT INSTRUCTION I.PLEASE READ BEFORE ATTEMPTING SERVICE
1.Do not connect any antenna plug directly to the tuner socket and do not connect any equipments directly to the TV chassis,otherwise it may be burnt out the TV or equipment,execept an isolation transformer is used for main power source or the TV sets.
2.Never disconnect any leads while receiver is in operation. 3.Disconnect all power before attempting any repairs.
4.Do not short any portion of the circuit while power is on.
5.For safety reasons,all parts replaced should be identical(for parts and part numbers see parts list).
6.Before alignment the set must be pre-heated for 30 minutes or more and erase magnetism thoroughly from CRT front chassis frame by erase coil.
II.TEST EQUIPMENT
1.Colour Bar/Dot/Cross Hatch 2.Oscilloscope
3.Vacuum Tube Voltmeter 4.Volt Ohumeter
5.High Voltage Meter
6.Ampere Meter (0.5 Class,DC 3mA Max.) 7.Demagnetizing Coil
8.Closed Caption Encoder 9.High Pot Tester.
I. B+ ADJUSTMENT
1.Connect a digital voltmeter to B+ and Ground. 2.Set Brightness Contrest to minimum.
3.Adjust Screen Volume on FBT until the picture can just been seen. 4.Adjust VR901 to obtain a reading of 112 + 0.5V(FOR samsung CRT).
II. AFC ALIGNMENT
1.Disconnect the soldering pad ‘F’.
2.Input the signal from Pattern Generator ( IF 38.9MHz ) colour bar to R101 and GND.
3.Adjust the T101 until the colour bar show on the screer.
4.Select ‘SELF VCO’in D-MODE.
5.Press the AFC button on the handset.
6.About few seconds screen willbe show AFT OK.
*REMARK: No this factory on Normal R.C.
III.AGC ALIGNMENT
1.Receive CH69 (UHF) and input filed strength. TUNER INput Signal 62 + 3dB, 2.Connect a digital Voltmeter between the TUNER AGC Terminal and Ground.
3.Select RAGC item,Adjust the value to 3F,and then adjust the AGC value obtain the voltage drop down 0.4V. Remark: 1 The drop down voltage should be more than and tends to 0.4V.
2 No observable noise can be seen.
IV.VERTICAL LINEARTY ADJUSTMENT
1.PAL (50Hz)Adjustment
(1).Receive Crosshatch Pattern (50Hz) .
(2).Select VLIS item adjust value to normal regular picture. 2.NTSC (60Hz) Adjustment.
(1).Reneive Cross hatch Patter (60Hz).
(2).Select VILN item adjust value to normal regular picture. 3.Repeat 1.2. receive Cross hatch 50Hz and 60Hz is same picture.
V. VERTICAL HEIGHT ADJUSTMENT
1.PAL (50Hz) Adjust .
(1).Recive Mono scope Patter (50Hz).
(2).Select HITS item adjust value to normal regular picture. 2.NTSC (60Hz).
(1).Receive Mono scope Patter (60Hz).
(2).Select HIT item adjust value to normal regular picture
3.Repeat 1.2. receive Mono Scope Patter 50Hz and 60Hz is same picture.
SM-49PM P.4
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